为啥公历2024年比农历龙年长12天？
<section style="margin-bottom: 0px;white-space: normal;outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;background-color: rgb(255, 255, 255);color: rgb(34, 34, 34);caret-color: rgba(0, 0, 0, 0);text-align: center;visibility: visible;line-height: normal;" data-mpa-powered-by="yiban.io"><br/></section><p></p><section data-role="outer" label="edit by 135editor" style="letter-spacing: 0.578px;white-space: normal;"><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;">送别2023年，我们迈入令人期待的2024年。天文科普专家介绍，公历2024年为闰年，2月有29天，全年共有366天，而即将到来的农历甲辰年（龙年）则是平年，全年共有354天。</span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;"><br style="outline: 0px;"/></span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);text-align: center;margin-bottom: 0px;line-height: 2em;"></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;">中国天文学会会员、天津市天文学会理事杨婧解释说，目前国际通用的公历在我国民间俗称“阳历”，是根据地球围绕太阳公转一周即一个回归年的运动周期来制定的。一个回归年的长度是365.2422天，即365天5小时48分46秒。</span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;"><br style="outline: 0px;"/></span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;">由于回归年不是整数，所以规定公历每4年设置1个闰年。凡公历年数能被4除尽的年份为闰年，2月有29天，全年366天；除不尽的年份为平年，2月有28天，全年365天。2024年能被4除尽，所以是闰年。但如果是整世纪年（如1800年、1900年、2100年）可以被100整除但不能被400整除，仍为平年。</span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;"><br style="outline: 0px;"/></span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);text-align: center;margin-bottom: 0px;line-height: 2em;"></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;">农历是我国的传统历法，它对年、月和节气的安排是以月相盈亏和太阳周年视运动两个自然周期为依据制定的。</span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;"><br style="outline: 0px;"/></span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;">农历根据月亮的朔望变化定月，全年12个月，大月30天，小月29天，全年354天或355天，比公历年（也称回归年）的365天或366天少了10至12天。</span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;"><br style="outline: 0px;"/></span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;">为了调节12个朔望月与一个回归年的时差，我国古人采用设置“闰月”的方法。现行农历“置闰”方法是“十九年七闰”，即每隔2到3年增加1个月，增加的这个月叫“闰月”。有闰月的年份叫闰年，包含13个农历月，年长384天或385天，反之没有闰月的年份称为平年。</span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;"><br style="outline: 0px;"/></span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;">杨婧表示，“置闰”的规则是依据二十四节气来定。农历以十二个中气分别作为十二个月的标志，即每个月都有一个中气。如果一个农历月里没有中气，这个月就称为上一个月的“闰月”。</span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;"><br style="outline: 0px;"/></span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);text-align: center;margin-bottom: 0px;line-height: 2em;"></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;"><br style="outline: 0px;"/></span></p><p style="outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;white-space: normal;background-color: rgb(255, 255, 255);margin-bottom: 0px;line-height: 2em;"><span style="outline: 0px;font-family: Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;font-size: 17px;color: rgb(89, 89, 89);letter-spacing: 1px;">即将到来的农历甲辰年没有闰月，因此是一个平年，其对应的公历日期为2024年2月10日至2025年1月28日，共计354天。</span></p></section><section data-role="outer" label="edit by 135editor" style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;background-color: rgb(255, 255, 255);visibility: visible;"><h2 style="color: rgb(96, 92, 92);letter-spacing: 0.544px;outline: 0px;font-family: system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif;visibility: 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